CPx Gas or Oil Cabinet Heater Range

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1 Issue 2.2 November 2014 CPx Gas or Oil Cabinet Heater Range Industrial & Commercial Heating Systems. Users, Installation and Servicing Instructions Gas & Oil Fired Cabinet Heaters CPx30 - CPx300 (L4064B) WARNING: THIS APPLIANCE MUST BE EARTHED GB & IE H E A T I N G / / V E N T I L A T I O N / / A I R C O N D I T I O N I N G

2 powrmatic Certificate of Guarantee Dear Customer This is to certify that this heater is guaranteed for two years parts and one year labour from the date of original commissioning. The heater must be commissioned within 4 weeks of installation. The heat exchanger, where fitted, is guaranteed (parts only) for a further eight years, chargeable on a sliding scale basis, price relative to age. To make a claim In the first instance you must contact your appliance supplier, or installer and provide:- 1. The appliance type and serial number. 2. The original commissioning documentation. 3. As much detail as possible on the fault. Your supplier, or installer, will then contact Powrmatic to make a guarantee claim on your behalf. Conditions of Guarantee 1. The heater must have been installed by a competent recognised installer, and in accordance with the manufacturers instructions, building regulations and local regulations. 2. The heater has been professionally commissioned, within 4 weeks of installation, and a copy of the Commissioning Sheet returned to Powrmatic. 3. The heater has been maintained on a yearly basis by a competent servicing company. 4. The heater has been used in accordance with the manufacturers instructions. 5. The correct specification fuel has been used 6. No unauthorised repairs or modifications have been made. 7. Powrmatic General Conditions of Sale have been observed. 8. Except for the obligation of Powrmatic Ltd to perform warranty repairs during the guarantee period, Powrmatic will not be liable in respect of any claim for direct or indirect consequential losses, including loss of profits or increased costs arising from loss of use of the heater, or any event arising there from. Exclusions 1. Gaskets and fan belts are not included in the guarantee Powrmatic Ltd, Hort Bridge, Ilminster, Somerset, TA19 9PS Tel: Fax: Web: warranty@powrmatic.co.uk Important: This certificate must be kept with the appliance Failure to provide a copy of the installtion sheet invalidates the destratification fan warrantee Installer Date : Signed Installer Commissioned Date : Signed Commissioning Engineer Page 2 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

3 Dear Customer - thank you for choosing Powrmatic. We appreciate you buying one of our high quality products and know that you have made the best choice. By choosing Powrmatic, you are investing in UK manufacturing & its workforce. We pride ourselves by manufacturing products that provide clean, comfortable and safe working environments worldwide together with the personal & professional service and back-up you deserve. If you have any questions or concerns regarding this product, please contact our Technical Support Team by calling Users, Installation and Servicing Instructions CONTENTS Title Section Contents Page User Instructions 4 Pre Installation Installation Data Servicing 1.1 Introduction General Requirements Size Data Fitting the unit Fitting the Flue and Combustion and 15 Ventilation Air Requirements 2.3 Basic Unit Electrical Cable Instrallation Commissioning and Testing Technical Data Short List of Parts Servicing Fault finding 26 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 3

4 Users Instructions A) Checks before lighting the Air Heater The following checks must be made before lighting the heater(s) a) Ensure the electrical supply to the heater is switched OFF. b) Check that all warm air delivery outlets are open. c) Check that the thermostat is set at MAX. d) Check that the clock control is set to an ON period. e) Check that any other controls are calling for heat and, if there is a Summer/Winter mode, it is set to Winter. f) Check that the overheat reset button has not operated. B) Lighting the Air Heater 1) Gas-fired Heaters 1. Switch on the electrical supply at the isolator. 2. The burner air fan will run and after a pre purge period of approximately 30 seconds the ignition spark will be generated. CPx The main gas valves will open and the main burner will be established CPx The start gas valves will be opened and a start gas flame established. When a start gas flame is established the main gas valves will be energized and the start gas flame will expand to main flame. NOTE: If the main burner or a start gas flame fails to establish the burner will go to lockout and the lockout indicator / reset button on the burner control box will be illuminated. To restart the burner push the lockout reset button. Additional, more easily accessible, controls may be fitted that mimic the lockout indicator and reset button functions. If the unit will not light after four or five attempts then shut down the unit and call in a service engineer. 2) Oil-fired Heaters NOTE: If it is not possible to light the heater after 2/3 attempts contact the local service company. 2. The burner air fan will run and after a pre purge period of approximately 30 seconds the ignition spark will be generated and the oil valve opened. The main burner will then fire. NOTE: If the burner fails to light it will go to lockout and the lockout indicator / reset button on the burner control box will be illuminated. To restart the burner push the lockout reset button. If the unit will not light after four or five attempts then shutdown the unit and call in a service engineer. C) To Shut Down the Air Heater 1) For Short Periods: Turn the room thermostat to the OFF or lowest setting. 2) For Long Periods: Turn the room thermostat to the OFF or lowest setting. Wait approximately 4-5 minutes for the main air fan of the heater to stop running and the turn off the gas or oil supplies and electric supplies to the heater. D) Description of Operation Important: All heaters must be controlled by the fitted external controls and not by use of the main switch in the electrical supply to the heater. The burner start up sequence will commence when the controls e.g. Timeclock, room thermostat etc. call for heat. The burner air fan will run and after a pre purge period the burner will light. Approximately 2/3 minutes after the burner lights the heater fan will automatically start. When the external controls are satisfied the burner will be turned off and approximately 4/5 minutes later the heater fan will automatically stop. 1) Summer / Winter Modes Certain types of external controls will provide for two modes of operation i.e. Summer: The heater fan alone will run at the dictate of the external controls to provide air movement. Winter: The heater will operate normally. 1. Switch on the electrical supply at the isolator. Page 4 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

5 E) Fan and Limit Control The fan and limit controls are mounted towards the top of the air heater upper front panel. i) Main Air Fan MAN / Auto When the white button (Refer to Figure 1 below) is pushed in the fan will run continuously i.e not controlled by any external controls e.g. Timeclock. When the white button is pulled out the fan will start and stop automatically in conjunction with the burner. See Section 4. ii) Limit Thermostat This operates if high temperatures within the heater are detected, the burners are turned off and a red indicator light on the front of the heater is illuminated. The fault condition must be identified and rectified and the thermostat manually reset. When the unit has cooled push the reset switch on the front of the heater to reset the limit thermostat interlock relay, the red indicator light will go out and the unit is operational again. Note: The limit thermostat(s) can only be reset once the unit has cooled down. Unless the cause of the fault condition is readily obvious, for example a power cut whilst the heater was operating, a service engineer should be contacted. Note: The limit thermostat interlock relay will require resetting after loss of the electrical supply to the heater regardless of whether the limit thermostat has operated. Fig 1. Limit Thermostat F) Maintenance Regular servicing is essential to maintain efficient, reliable and safe operation of the heater. Users are strongly recommended to have the heater serviced at least annually and preferably at the end of the heating season. G) IMPORTANT Free access must be maintained to and around the heater for servicing purposes and the air supply to the heater must not be restricted in any way. Combustible materials must not be stored adjacent to the heater. All Powrmatic heaters use gas, or oil, and electricity to power them, they may also contain moving parts such as pulley belts. It would be hazardous to tamper with or attempt to service unless you are a competent person in the field of Gas and Electrical work. If you have any safety questions reference the servicing and installation of any of our heaters please do not hesitate to contact our head office for expert advice. Your safety is paramount to us. For gas fired heaters only: If at any time a gas leak is suspected turn OFF the gas supply - DO NOT USE A NAKED FLAME - and contact the local gas undertaking immediately. Gas Safety (Installation & Use) Regulations It is law that all gas appliances are installed, adjusted and, if necessary, converted by qualified persons* in accordance with the latest edition of the above regulations. Failure to install appliances correctly can lead to prosecution. It is in your own interests and that of safety to ensure that the law is complied with. * An approved class of person listed on the gas register. PUSH MAN PULL AUTO White Fan button Honeywell CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 5

6 1.1 Introduction The Powrmatic CPx range of closed flue, fanned circulation air heaters cover a heat output range of 30 kw to 290kW and are intended primarily for heating commercial or industrial premises. They are B23 type appliances fitted with either a gas fired forced draught burner or a pressure jet oil fired burner. Fuel Types Gas fired units are certified for use on Natural Gas, Group H - G20, Group L - G25 and Propane - G31. Oil fired units are supplied as standard for use with 35sec fuel and can be supplied for use with 28sec fuel as an option. In accordance with guidelines from our burner supplier, Riello, the burners fitted to Powrmatic oil-fired heaters are suitable for fuels with a bio content of up to 10% only. For fuels with a bio content of more than 10% please consult our Technical Department. CPx heaters have a centrifugal fan assembly fitted upstream of the combustion chamber / heat exchanger assembly to circulate the air being heated. CPx heaters are available in three styles: Standard Style Suitable for internal applications only and available in /UF, /UD, /HD, /HF, /CF and /CD variants (see below). /UF and /UD models are floor standing, /HD, /HF, are horizontally mounted on purpose design supports. /CD models can be plinth mounted at floor level. /CF and /CD models can be mounted at high level on purpose design supports. CPx/NCA Style Suitable for internal applications only and having an extended casing that encloses the burner. Available in /UF and /UD variants only(see below). CPx/EA Style Casing is extended to enclose the burner. The heater is fully weatherproof and designed for external applications only. Available in /TD, /HD, /RT and /SD variants (see below). Variant types are:- /UF - Upright heater with free blowing rotatable heads. /UD - Upright heater with outlet duct spigot (inlet duct spigot optional). /HF - Horizontal heater with free blowing rotatable heads. /HD - Horizontal heater with outlet duct spigot (inlet duct spigot optional). /CF - Counterflow heater with free blowing rotatable heads. /CD - Counterflow heater with outlet duct spigot (inlet duct spigot optional). /TD - Rooftop heater with top outlet duct spigot (inlet duct spigot optional). /RT - Rooftop heater with outlet duct spigot on the underside (inlet duct spigot optional). /SD - Upright heater with side outlet duct spigot (inlet duct spigot optional). Other options include High/Low or modulating burners, uprated main fan motors, flue support bracket, deep V filters, flat panel filters, proportional air dampers, combustion air inlet adaptors and inlet and outlet duct spigots. Each air heater must be connected to a closed flue system only. IMPORTANT Service and Maintenance Engineers shall ensure that replacement items are fitted, adjusted and set in accordance with the data and detail set out in these instructions. If in doubt consult Powrmatic Technical Department. For gas fired heaters only. Gas Safety (Installation & Use) Regulations It is law that all gas appliances are installed, adjusted and, if necessary, converted by qualified persons* in accordance with the latest edition of the above regulations. Failure to install appliances correctly can lead to prosecution. It is in your own interests and that of safety to ensure that the law is complied with. * An approved class of person listed on the gas register. Page 6 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

7 1.2 General Requirements Gas Fired Heaters Related Documents The installation of the air heater(s) must be in accordance with the rules in force and the relevant requirements of the Gas Safety Regulations, Building Regulations and the I.E.E. Regulations for Electrical Installations. It should also be in accordance with any relevant requirements of the local gas region, local authority and fire authority and the relevant recommendations of the following documents. Institution of Gas Engineers & Managers IGE/UP/1 (Ed.2) Strength and tightness testing and purging of industrial and commercial gas installations. IGE/UP/1A (Ed.2) Soundness testing and direct purging of small low pressure industrial and commercial gas installations. IGE/UP/1B (Ed.2) Tightness testing and direct purging of small Natural Gas installations. IGE/UP/2 Gas installation pipework, boosters and compressors on industrial and commercial premises. IGE/UP/4 (Ed.2) Commissioning of gas fired plant on industrial and commercial premises. IGE/UP/10 (Ed.3) Installation gas appliances in industrial and commercial premises. British Standards & Codes of Practice BS 9999 Code of practice for fire safety in the design, management and use of buildings BS 6230: 2011 Installation of Gas Fired Forced Convection Air Heaters for Commercial and Industrial Space Heating. Those appliances having a gross input rating not exceeding 60kW viz. CPxG30-45 inclusive and installed so as to take their combustion air from within the building must be installed in accordance with the relevant recommendations of the following document. BS 5440 Flues and Air Supply for gas appliances of rated input not exceeding 60kW (1st and 2nd family gases), Part 2 Air Supply Reference should also be made to:- BS Installation and maintenance of gas-fired ducted air heaters of rated heat input not exceeding 70 kw net (2nd and 3rd family gases) Service Pipes The local gas undertaking should be consulted at the installation planning stage in order to establish the availability of an adequate supply of gas. An existing service pipe must not be used without prior consultation with the local gas undertaking Meters A gas meter is connected to the service pipe by the local gas undertaking or a local gas undertaking contractor. An existing meter should be checked, preferably by the gas undertaking, to ensure that the meter is adequate to deal with the total rate of gas supply required Installation Pipes Installation pipes should be fitted in accordance with IGE/UP/2. Pipework from the meter to the air heater must be of adequate size. Do not use pipes of a smaller size than the inlet gas connection of the heater. The complete installation must be tested for soundness as described in the above Code Oil Fired Heaters Related Documents The installation of the air heater(s) must be in accordance with the rules in force and the relevant requirements of the Building Regulations and the I.E.E. Regulations for Electrical Installations. It should also be in accordance with any relevant requirements of the local authority and fire authority and the relevant recommendations of the following documents. OFTEC Technical Book 3: Domestic & Commercial requirements for oil storage and supply equipment. OFTEC Technical Book 4: Oil fired appliances & system installation requirements. OFTEC Easy Guides to non domestic oil feed pipes and oil storage. CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 7

8 CPx UD/UF Upright Free Blowing and Ducted (30-300) 1.3 Size Data Notes:- Flue Tee provided as standard A B C D E Model All All All All All mm mm mm mm Ø mm F All mm G All mm H Gas mm Oil mm J All mm J1 All mm n/a n/a K All mm L Duct mm M Spigot mm Head Plan Page 8 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

9 CPx HF/HD Horizontal Free Blowing and Ducted (30-300) Notes:- FlueTee provided as standard. Screened air intake (SAI) fitted as standard on HF models Duct spigot option available. Direction of airflow to be specified at time of order. Left to Righ ( L -R when looking at the burner) airflow shown above. Model A B C D E All All All All All mm mm mm mm Ø mm F All mm G All mm H Gas mm Oil mm J All mm L Duct mm M Spigot mm N All mm Head Plan CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 9

10 CPx - EA External Cabinet Heaters (30-300) Notes:- Direction of airflow to be specified at time of order. Left to Right (L-R when looking at the burner) airflow shown above. Inlet and Outlet duct spigots have the same dimensions. Primary flue length, cowl and flashing provided as standard. Model A B C D All All All All mm mm mm mm Ø F All mm L Inlet Duct mm M Spigot mm L Outlet Duct mm M Spigot mm N All mm Page 10 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

11 * Head plan 2 can not be inverted, as one head needs to be placed over the limit stat. 2.1 Fitting the unit General Before installation, check that the local distribution conditions, fuel specification, and adjustment of the appliance (see data plate) are compatible. Important: Copper Sulphide / Black Dust In some areas of the UK, particularly Northern Ireland, problems have been experienced with copper sulphide (more commonly referred to as Black Dust ) forming on the inner surfaces of copper gas supply pipework. This dust can enter the gas stream and may lead to blockages of valves, filters and injectors. If this heater is being installed in an area where Black Dust is known to be a problem, and copper gas supply pipework is used, it is recommended that a filter having a stainless steel 50 micron mesh and suitable for Natural Gas is fitted at the inlet to the appliance immediately downstream of the main appliance isolation valve. The end user should be advised that the filter will require periodic cleaning or replacement at least once per year, during the annual service, or more often if the problem is severe Location The location chosen for the air heater must permit: - the provision of a satisfactory flue system and an adequate air supply. - adequate space for servicing and air circulation around the air heater. The heater(s) must not be installed in conditions for which it is not specifically designed e.g. where the atmosphere is corrosive or salty, and they are not suitable for outdoor use unless the CPx/EA style is specified. CPx/EA heaters must be installed on a plinth such that there is a minimum distance of 0.5m between ground level and the lowest point of any air inlet grilles. Where the location of the air heater is such that it might suffer external mechanical damage e.g. from overhead cranes, fork lift trucks, it must be suitably protected. CPx heaters are for normal operation within an ambient temperature range of -10 to 25 C. The air heater must be installed in accordance with the rules in force and the relevant requirements of any fire regulations or insurance company's requirements appertaining to the area in which the heater is located, particu- CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 11

12 larly where special risks are involved such as areas where petrol vehicles are housed, where cellulose spraying is carried out, in wood working departments etc. IMPORTANT: Heaters shall not be installed in:- a) Those parts of spaces within buildings that have been classified as hazardous areas as defined in BS EN b) Where there is a foreseeable risk of flammable particles or gases or corrosion inducing gases or vapours being drawn into either the heated air stream or the air for combustion. In such cases installation may only proceed if both air sources are from an uncontaminated source, preferably from outside the building. It may also be necessary to purge the air heater before the burner is allowed to fire. In certain situations where only airborne particles are present it may suffice to fit filters on the main air inlet duct of the heater. Advice in these instances must be obtained from Powrmatic Ltd. c) In areas subjected to significant negative pressures due to extract systems Installing the Air Heater If necessary consideration should be given to mounting the heater on resilient pads, or equivalent, to minimize transfer of noise and vibration to the structure of the building. Floor mounted heaters must be installed on a level noncombustible surface. Heaters mounted at high level must be supported on a purpose designed platform or framework that is suspended from vertical drop rods, chains or straps or mounted on specifically designed cantilever brackets from a non-combustible wall. The method of installation support must be capable of adequately supporting the weight of the unit (See Table 2, Page 21) and any ancillary equipment. Before installing the heater the existing structure must be inspected to ensure it is suitable. All supports should be protected against the effects of rust or corrosion. Whichever method of mounting the air heater is used the following minimum clearances for installation and servicing must be observed. To the front The depth of the heater (A) To the rear 1.0m To the side having louvred lower panels 1.0m To the side having blank lower panels (see below) 0.15m Above the heater 1.0m Fig 1 Minimum clearance distance Page 12 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

13 CPx Combustion & Ventilation Air Supply Type B23 Installation These refer to section of the instructions Air vents shall be permanently open. Figures in column 1 are for heaters installed in the space they are heating. Figures in column 2 are for heaters installed in a plant room, ventilation to outside air. Figures in column 3 are for heaters installed in a enclosures, ventilation to outside air. In all cases figures are per heater installed. For multi heaters installations the appropriate values for each heater must be added together In the In a plant room In an enclosure Space CPx Input Low Low High Low High kw Level Level Level Level Level Grille Grille Grille Grille Grille Free Free Free Free Free Area Area Area Area Area cm 2 cm 2 cm 2 cm 2 cm Important: CPx 250 & CPx 300 heaters have louvred lower panels on both sides. The minimum clearance of 0.15m is increased to 0.5m. Important: Smaller heaters are supplied with one blank side panel and one louvred side panel. If the heater is installed against a wall ensure that the blank panel is facing the wall, interchanging the two side panels if necessary. Any combustible material adjacent to the air heater and the flue system must be so placed or shielded as to ensure that its temperature does not exceed 65 C. If the method of mounting allows for any movement of the heater it is essential that all gas, duct, and electrical connections to the heater are made with flexible connections to maintain continuity of connection Combustion & Ventilation Air Supply There shall be provision for a supply of air for combustion and, in the case of heaters installed in an enclosure or plant room, for ventilation. Actual values relating to the details below 1) Installation in the heated space In buildings with a design air change rate of 0.5 /h or greater, additional natural or mechanical ventilation is not necessary. In buildings not having a design air change rate of 0.5 /h the following apply. Natural Ventilation Grilles having a free area of at least 2cm² per kw of rated heat input shall be provided at low level i.e. below the level of the heater flue connection. Mechanical Ventilation Must ensure that the space air change rate is at least 0.5/h, must be of the input type and interlocked to ensure the heaters cannot work if the input system is not working. CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 13

14 2) Installation in plant rooms or enclosures There must be permanent air vents communicating directly with the outside air, at high level and at low level. Plant Rooms Low level (inlet) 4cm²/kw of total rated net heat input High level (outlet) 2cm²/kw of total rated net heat input Enclosures Low level (inlet) 10cm²/kw of total rated net heat input High level (outlet) 5cm²/kw of total rated net heat input Mechanical Ventilation The minimum flow rate of ventilation shall be 4.14m³/h per kilowatt of total rated heat input Gas Connection (if applicable) A servicing valve and union must be fitted at the gas inlet to the heater to facilitate servicing. The gas supply to the air heater must be completed in solid pipe work and be adequately supported. Heaters suspended by drop rods, straps or chains must have a flexible connection as the final link between the gas supply pipe work and the heater. Sufficient slack must be left in the connection to take account of normal movement of the heater. Warning: When completing the final gas connection to the heater do not place undue strain on the gas pipe work of the heater Oil Connection (if applicable) Refer to the supplied burner installation instructions for details regarding oil supply options Air Distribution System For free-blowing units used in buildings having a low heat loss i.e. where single units are required to cover a large floor area, and in buildings with high roof or ceiling heights Calecon thermal economiser units should be fitted to ensure even heat distribution and minimise stratification. Care should be taken to avoid impeding the heater air throw with racking, partitions, plant or machinery etc. Various outlet configurations are available as optional extras to modify the air throw pattern to suit particular site conditions. CPx*/D models are designed for use with duct work to more precisely define the point of air delivery, and /or provide ducted return air or ducted fresh air inlet. All ducting must be independently supported of the air heater. All delivery and return air ducts, including air filters, jointing and any insulation or lining must be constructed entirely of materials which will not contribute to a fire, are of adequate strength and dimensionally stable for the maximum internal and external temperatures to which they are to be exposed during commissioning and normal operation. Where inter-joist spaces are used as duct routes they should be suitably lined with a fire-resisting material. A full and unobstructed return air path to the air heater(s) must be provided. If the air heater(s) is installed in a plant room the return air intake(s) and the warm air outlet(s) from the heater(s) must be fully ducted, into and out of the plant room to avoid interference with the operation of the heater from other equipment. The openings in the structure of the plant room through which the ducting passes must be fire stopped. Care must be taken to ensure that return-air intakes are kept clear of sources of smells and fumes, and where there is any possibility of pollution of the air by dust, shavings etc., precautions must be taken to prevent contamination. If necessary suitable barrier rails should be provided to prevent any combustible material being placed within 900mm of the outlets. Joints and seams of supply ducts and fittings must be securely fastened and made airtight. It is recommended that ducting should be connected to the heater spigots via an airtight flexible coupling of noncombustible material. Before fitting coupling it must be ensured that an adequate clearance will be maintained between the ends of the ducting and the heater spigots. If required sound attenuators may be fitted in inlet and outlet ducts to reduce airborne fan noise. Materials used in outlet sound attenuators must be capable of withstanding 100 C air temperature without any deterioration Room Thermostat Siting If a remote room thermostat, or controller with an integral sensor, is used it should be fitted at a point which will be generally representative of the heated area as far as Page 14 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

15 temperature is concerned. Draughty areas, areas subjected to direct heat e.g. from the sun, and areas where the air movement is relatively stagnant e.g. in recesses, are all positions to be avoided for siting the thermostat. Any room thermostat, frost thermostat, time clock etc. must be suitable for switching 230V, 5A and must be of the 'snap action' type to minimise contact bounce. For electrical connections of external controls see the accompanying wiring diagram. The thermostat should be mounted about 1.5m (5ft) from floor level. 2.2 Fitting the Flue, Combustion and Ventilation Air Requirements A single wall tee piece is supplied with each heater and must be fitted to the flue outlet socket on the heater. A closed chimney system that conforms to the requirements of EN and has a designation appropriate to the application must be connected to the outlet of this tee. The cross sectional area of the chimney serving the appliance must be not less than the area of the flue outlet of the air heater. The chimney must have a minimum height, from the heater to the flue terminal, of 2m. Horizontal runs of flue must be minimised but where they are unavoidable the ratio of vertical to horizontal flue should be not less than 3:1. If necessary a single offset using two 45 bends can be included to avoid obstructions. The minimum equivalent resistance of the flue system should not be less than 0.0mb, the maximum not greater than 0.5mb. Details of how to calculate the resistance of the flue to be installed are given in Appendix A. In order to minimise condensation the use of twin wall chimney is recommended. With high efficiency heaters some condensation in the chimney, particularly at the terminal, is unavoidable and in addition there can also be rain water ingress. Use of a chimney system having joint seals will minimise any leakage from the flue system. The heater tee is provided with a collection tray and the outlet from this should be run to a drainage point e.g. a gully. The condensation pipe from the collection tray to the disposal point should be of non-corrodible material of not less than 22mm (3/4") size. Facilities should be made for disconnecting the chimney pipe(s) from the air heater(s) for inspection and servicing purposes. The chimney outlet must be fitted with a terminal and where the heater chimney is less than 200mm (8") in diameter an approved terminal must be used. The chimney must be supported independently of the air heater. The chimney must terminate in a freely exposed position and must be situated so as to prevent the products of combustion entering any opening in a building in such concentration as to be prejudicial to health or a nuisance. The chimney terminal must be installed not less than: - 300mm below an opening e.g. window, air brick etc mm below eaves or gutter mm from an internal or external corner mm from a surface facing the terminal. - 0mm vertically from another terminal on the same wall mm horizontally from another terminal on the same wall mm from ground level. CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 15

16 2.3 Basic Unit Fan / Limit stat Exhaust Flue Burner Data Plate MC200 Controller High Limit Reset Electrical Connections (behind cover) 2.4 Electrical Cable Installation Electrical Connections Wiring external to the air heater must be installed in accordance with the I.E.E. Regulations for Electrical Installations and any local regulations which apply. Wiring should be completed in flexible conduit. Heaters are for use with 230V, 1N, 50Hz or 400V, 3N, 50Hz supplies (see heater data plate). The method of connection to the main electricity supply must:- - facilitate the complete electrical isolation of the heater(s) that will prevent remote activation of the heater during servicing. - be in a readily accessible position adjacent to the heater(s). - serve only the heater(s). - have a contact separation of at least 3mm in all poles. See the wiring diagram for the heater electrical connections. All units are fully prewired and only require final connections for the incoming mains supply. Heaters not supplied with inbuilt time and temperature controls will also require completion of the external control circuit (230V) via a room thermostat, time clock etc. and, if applicable, the remote low level lockout reset. All heaters must be earthed. Reference must be made to Table 3 Page 21 to ascertain the electrical loading of the unit(s) being installed so that cables of adequate cross-sectional area are used for the electrical installation. The length of the conductors between the cord anchorage and the terminals must be such that the current carrying conductors become taut before the earth conductor if the cable or cord slips out of the cord anchorage. All external controls must be of an approved type. Page 16 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

17 Heaters supplied less main fan must be electrically interlocked to the air movement system so that this is started in the same manner as the air heater fan would be viz. A connection from the appropriate heater terminal (see wiring diagram with the heater) must be made to one side of the fan motor contactor coil, the other side of the coil being connected to Neutral. Under no circumstances must the fan motor electrical supply be taken direct from the internal wiring of the heater. A = 2 core and earth (Single Phase) 4 core and earth (Three Phase) B = Powrtrol = 4 core and earth Powrtrol RR = 4 core and earth MC200 = 4 core and earth C = 2 core screened (MC200 model only)* *(screen must be grounded only at the MC200) Standard Uprated Motor Motor FUSE FUSE MODEL PH RATING RATING (A) (A) CPx N/A CPx N/A CPx N/A CPx N/A CPx N/A CPx CPx CPx CPx CPx Commissioning & Testing Electrical Installation Checks to ensure electrical safety must be completed by a competent person Gas Installation (if applicable) The whole of the gas installation, including the meter, should be inspected and tested for soundness and purged in accordance with the recommendations of IGE/UP/1 or IGE/UP1A or IGE/UP/1B as appropriate. be inspected and tested in accordance with the recommendations of OFTEC Air Distribution System The system should be checked to ensure that the installation work has been carried out in accordance with the design requirements. Particular attention should be given to the correct arrangement of delivery ducts and registers, return air ducts and grills and general adequacy of return air paths Oil Installation (if applicable) The whole of the oil installation, including the tank, should For CPx*/D heaters ensure that the total duct system resistance does not exceed the available air pressure of the equipment supplied refer to Table 2 (Page 21). If the duct system resistance is less than the available air pres- CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 17

18 sure of the equipment supplied additional resistance must be introduced e.g. by adjustment of duct outlet nozzles and balancing of the duct system. Conversely if the duct system resistance is greater than the available air pressure of the heater supplied the system resistance must be reduced Lighting the Air Heater Note: The limit thermostat interlock relay will require resetting after loss of the electrical supply to the heater regardless of whether the limit thermostat has operated Gas Fired Heaters Note: Refer also to the burner instruction booklet supplied with the heater. This provides information on how to adjust the burner, setting up the air pressure switches, system checks and fault finding detail. Note: DO NOT use burner settings from the burner instruction booklet. The burners are specifically adjusted for Powrmatic heaters, only use the settings in these instructions Gas Controls Assembly Soundness Check 1. Ensure the gas service valve at the inlet to the gas controls assembly is shut. 2. To prove soundness of the first main safety shut-off valve:- a) Connect pressure gauge to the inlet pressure test point on the main valve block or inlet pipework. b) Open gas service valve and allow pressure to stabilize before shutting it again. The valves are sound if no pressure drop is observed. If a pressure drop is observed do not proceed until the fault has been rectified. Remove pressure gauge and refit sealing screw in pressure test point Sequence Check 1. Ensure that the gas service valve is closed and that the main electrical supply to the heater is switched off. 2. Start the burner by setting the time clock and thermostat to call for heat or complete the external control circuit. 3. Turn ON the main electrical supply, press the limit interlock relay reset switch and check that the following sequence of events occurs. i) Burner fan runs. ii) Ignition spark is heard. iii) Start gas valves open (Main gas valves on CP-G ). iv) Burner goes to lockout as there is no gas supply. 4. Switch OFF main electricity supply Final Adjustment CPxG Remove the sealing screw from the pressure test point located on the side of the gas inlet to the burner head and attach a pressure gauge. Remove the sample point cover plug from the outlet flue length and insert a CO2 measuring instrument. 2. Turn ON the main electricity supply, press the limit interlock relay reset switch and check that the following sequence of events occur. i) Burner fan runs. ii) Ignition spark is heard. iii) Main gas valves open and main gas flame is established. 3. Check that the main burner gas pressure agrees with that stated on the heater data plate. If necessary adjust the main burner gas pressure (Fig 2 Page 21) by rotating the adjustment screw under the cover flap. If the range of adjustment does not allow for setting of the correct burner pressure the main volume regulator may also be used. It is recommended that the main governor adjustment is within 50% to 75% of its range. 4. Measure the CO2 content of the flue gases. If necessary adjust the combustion air damper of the burner (Refer to the Burner Instructions) to obtain a reading of % 5. Turn OFF the burner, remove pressure gauge and refit sealing screw in pressure test point and flue sample point cover plug. Pressure adjustment Screw under cover Main volume regulator Fig 2 Dungs valve Pressure adjustment CPxG Remove the sealing screw from the pressure test point located on the side of the gas inlet to the burner head and attach a pressure gauge. Remove the sample point cover plug from the outlet flue length and insert a CO2 measuring instrument. Page 18 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

19 2. Turn ON the main electrical supply, press the limit interlock relay reset switch and the burner will run through its sequence until main flame is established. Check that the main burner gas pressure agrees with that stated on the heater data plate. If necessary adjust the main burner gas pressure (Fig 2) by rotating the adjustment screw under the cover flap. If the range of adjustment does not allow for setting of the correct burner pressure the main volume regulator may also be used. It is recommended that the main governor adjustment is within 50% to 75% of its range. 3. Measure the CO2 content of the flue gases. If necessary adjust the combustion air damper of the burner (Refer to the Burner Supplement) to obtain a reading of %. 4. Turn OFF the burner. Remove pressure gauge, refit sealing screw in pressure test point and flue sample point cover plug Final Soundness Test 1. After making final gas rate checks all joints on the gas controls assembly must be tested for soundness using leak detection fluid/electronic leak detector Flame Safeguard 1. Whilst the burner is in operation close the gas service valve. The burner should go to lockout within 1 second Air Pressure Switch Note: Refer to the burner instruction booklet but follow the steps below. The air pressure switch is nearest the front of the burner. 1. The air pressure switch is set after all other adjustments have been made. 2. Begin with the switch at the lowest setting. With the burner working at the minimum output, adjust the dial clockwise, increasing its value until the burner shuts down. Now reduce the value by one set point, turning the dial anti-clockwise. 3. Check for reliable burner operation, if the burner shuts down, reduce the value by a half set point Over Pressure Switch Note: Refer to the burner instruction booklet but follow the steps below. The over pressure switch is furthest from the front of the burner. 1. The maximum air pressure switch must be set after all other adjustments have been made. 2. Begin with the switch at its highest setting and the burner working at the correct input for high fire. 3. Slowly adjust the pressure switch dial anti-clockwise, to decrease the set point, until the burner locks out. Immediately stop adjustment. 4. Now increase the set point by 0.1mb and restart the burner. 5. If the burner fails to start, or shuts down due to the pressure surge on ignition, increase the pressure switch setting by a further 0.1mb and restart the burner. 6. Continue until the burner reliably starts Oil Fired Heaters Note: Refer also to the burner instruction booklet supplied with the heater. This provides information on how to adjust the burner, setting up the air pressure switches, system checks and fault finding detail. Note: DO NOT use burner settings from the burner instruction booklet. The burners are specifically adjusted for Powrmatic heaters, only use the settings in these instructions Initial burner startup 1.Check that fuel is present in the tank and at the oil filter fitted on the front of the heater. 2. Check that fitted fire valves are open. 3. Refer to the burner instruction book and fit a pressure gauge (and vent valve if the burner is on a single pipe oil feed) to the oil pump. 4. Set the time clock and thermostat to call for heat or complete the external control circuit. 5. Turn ON the main electrical supply, press the limit interlock relay reset switch and check that the burner fan starts. CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 19

20 6. Note: This step is only for when a vent valve is being used. Open the vent valve. When air free oil issues from the vent valve close the valve and the burner will fire when the ignition spark is present. (Note: This procedure may need to be repeated several times if the oil line cannot be purged of air within one ignition cycle. At the end of the unsuccessful ignition cycle the burner will go to lockout. Wait 2/3 minutes and then depress the red reset button on the burner control box to restart the ignition cycle.) 7. After completion of the pre-purge period the ignition spark will be energised and the burner oil solenoid valve will open and the burner will light. Warning: If burner ignition cannot be achieved after 2-3 attempts do not continue to recycle through the ignition sequence but ascertain the cause and rectify. WARNING: If continued unsuccessful ignition attempts are made it is possible to accumulate a significant quantity of oil and oil mist in the combustion chamber which, if the burner then fires, can result in a dangerous situation. Any such accumulation of oil must be removed by safe means before any further attempt to light the burner Final Adjustment 1.Remove the sample point cover plug from the outlet flue length and insert a CO2 measuring instrument. 2. Relight the burner. Check that the pump pressure is as specified on heater data plate. If adjustment of the pump pressure is necessary refer to the burner instructions and complete Final Checks 1. After making final adjustments check that there are no leaks on the oil pipework Main Air Fan/ Fan Stat Ensure that the fan and limit settings are as follows:- Fan ON F (50 C), Fan OFF - 86 F (30 C) Limit CPx 30-90, F (100 C) CPx F (110 C) CPx F (120 C) Note: The new L4064B may be supplied with the limit temperature mechanically limited to less than the setting required. To release the mechan ical limit push a pointed object into the small hole at the top of the dial. At the same time prevent the dial from rotating and push the limit temperature adjuster around to the required setting. On ducted units ensure that the main air fan comes on no later than to 180 seconds after the main burners light Handing over the Air Heater Hand these instructions to the user or purchaser for retention and instruct the User in the efficient and safe operation of the air heater. In the event that the premises are not yet occupied turn off the gas and electricity supplies and leave instructional literature with the heater. 3. Measure the CO2 content of the flue gases. If necessary adjust the combustion air damper of the burner (Refer to the Burner Instructions) to obtain a reading of %. 4. Turn OFF the burner. Remove pressure gauge and refit sealing plug, refit flue sample point cover plug. Page 20 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

21 Table 2. Specifications Model Nom. Input (Nett) Output Air Volume Maximum duct resistant Standard Motor Uprated Motor Fan motor Standard Motor Kw m³/s m³/h pa Kw Uprated Motor 3.1 Technical Data Fuel Connection Size Notes: CO 2 values and Nett flue gas temperatures are given for guidance and measured values will depend on site conditions. FF = Fully Forward CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 21 Gas Oil CPx Weight CPx /NCA Kg CPx N/A N/A Rc½ ¼ BSP CPx N/A N/A Rc½ ¼ BSP CPx N/A N/A Rc¾ ¼ BSP CPx N/A 1.1 N/A Rc¾ ¼ BSP CPx N/A 2.2 N/A Rc¾ ¼ BSP CPx Rc1¼ ¼ BSP CPx Rc1¼ ¼ BSP 530 TBA TBA CPx Rc1¼ ¼ BSP 530 TBA TBA CPx N/A Rc1¼ 556 CPx Rc1¼ 556 Table 3. Electrical Data Standard Motor Uprated Motor Fitted to EA models as standard Nominal Plate Start Run Fuse Nominal Start Run Fuse Model ph Motor Amps Amps Amps Rating Motor Amps Amps Amps R.P.M. (A) (A) (A) (A) R.P.M. (A) (A) (A) CPx N/A N/A N/A N/A CPx N/A N/A N/A N/A CPx N/A N/A N/A N/A CPx90G N/A N/A N/A N/A CPx90O N/A N/A N/A N/A CPx N/A N/A N/A N/A CPx CPx CPx CPx CPx CPx /EA 3/ 8 BSP TBA TBA 3/ 8 BSP TBA TBA Table 4.1 Burner Pressures - Natural Gas - Group H - G20 - Net CV (Hi) = 34.02MJ/m³ Riello Burners Air Gas Start Gas Main Burner Nom. Nett Model Type Head Gate Pressure Pressure Input Gas Rate CO 2 Flue T. No No mbar mbar kw m³/h % C CPxG 30 GS 5 0 N/A N/A CPxG 45 GS 10 FF N/A N/A CPxG 60 GS 10 1 N/A N/A CPxG 90 GS 10 FF N/A N/A CPxG 120 GS 20 2 N/A CPxG GS 20 FF N/A CPxG 175 GS 20 FF N/A CPxG 200 GAS CPxG 250 GAS 3 FF CPxG 300 GAS 3 FF Minimum Inlet pressure 17.5mbar

22 Table 4.2 Burner Pressures - Propane Gas - G31 - Net CV (Hi) = 88.0MJ/m³ Riello Burners Air Gas Start Gas Main Burner Nom. Nett Model Type Head Gate Pressure Pressure Input Gas Rate CO 2 Flue T. No No mbar mbar kw m³/h % C CPxG 30 GS 5 1 N/A N/A CPxG 45 GS 10 FF N/A N/A CPxG 60 GS 10 1 N/A N/A CPxG 90 GS 10 FF N/A N/A CPxG 120 GS 20 2 N/A CPxG GS 20 FF N/A CPxG 175 GS 20 FF N/A CPxG 200 GAS CPxG 250 GAS 3 FF CPxG 300 GAS 3 FF Notes: CO 2 values and Nett flue gas temperatures are given for guidance and measured values will depend on site conditions. FF = Fully Forward Inlet Pressure 37mbar Table 5 Pump Pressures - 35sec Oil - Net CV (Hi) = 42.69MJ/kg Riello Burners Nozzle Pump Oil Rate Nom. Nett Model Type Head Make Size Angle Type Pressure Input CO 2 Flue T. Setting bar p.s.i kw kg/h l/h % C CPxO 30 G5 2 Danfoss S CPxO 45 G10 1 Danfoss S CPxO 60 G10 2 Danfoss S CPxO 90 G10 4 Danfoss S CPxO 120 G20S 2 Danfoss S CPxO G20S 3 Danfoss S CPxO 175 G20S 4 Danfoss B CPxO 200 G20S 6 Danfoss B CPxO 250 Press GBV 3 Danfoss B CPxO 300 Press GBV 7 Danfoss B Note: CO 2 values and Nett flue gas temperatures are given for guidance and measured values will depend on site conditions. Table 6 Heat Exchanger Baffles Model CPx30 CPx45 CPx60 CPx90 CPx120 CPx CPx175 CPx200 CPx250 CPx300 Natural Gas None Top Tubes Top Tubes All Tubes Top Tubes All Tubes Top Tubes All Tubes All Tubes All Tubes Propane None Top Tubes Top Tubes All Tubes Top Tubes All Tubes Top Tubes All Tubes All Tubes All Tubes Oil - 35 sec. None None None Top Tubes None Top Tubes None Top Tubes Top Tubes Top Tubes Oil - 28 sec. None None None Top Tubes None All Tubes None Top Tubes Top Tubes Top Tubes Page 22 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

23 3.2 Short List of Parts Refer also to the burner supplement supplied with the heater ITEM Used on Part Number Gas Valve Block 30 & Gas Valve Block 60 & Gas Valve Block Gas Valve Block, 175 & Gas Valve Block 250 & Thermostat - Fan / Limit All Contactor Contactor Overload Overload Overload 120//175/ Soft Start 300LHP Heat Exchanger Cleanout Door Gasket. All Burner Gasket Burner Gasket Burner Gasket Burner Gasket Servicing WARNING: Always switch off and disconnect electricity supply, close the gas service valve or turn off the oil supply before carrying out any servicing work or replacement of failed components General Full maintenance should be undertaken not less than once per year. After any servicing work has been complete or any component replaced the air heater(s) must be fully commissioned and tested for fuel tightness as described in Section 2.5. Page Burner Servicing/Maintenance 1. Refer to the burner instructions supplied with the heater and complete the servicing/maintenance instructions therein. Note: In the case of gas burners ignore any references in the burner supplement to the gas controls assembly Heat Exchanger Cleaning 1. Removing the upper rear panel of the heater exposes the heat exchanger rear clean out panel. 2. Removing the fan/limit thermostat(s) as described in , Page 25 disconnecting the flue and then removing the upper front panel of the heater exposes the heat exchanger front clean out panels. If the flue cannot be disconnected removal of the side panels exposes the upper front header side clean out plates. 3. Remove the nuts securing the clean out panel(s) as appropriate and remove panel(s). 4. If heat exchanger baffles are fitted, withdraw them. 5. Brush through heat exchanger tubes and remove loose material using a vacuum cleaner. 6. If it is necessary to also gain access to the combustion chamber disconnect the fuel and electrical connections from the burner. Remove the nuts securing the burner to the heater and withdraw the burner from the burner tube. 7. Reassemble all components in reverse order. Note: Replace any gaskets with new ones Fan Assembly 1. Remove the lower panels of the heater to gain access to the fan section. 2. Inspect the fan blades to see that they are not damaged and that there is no excessive build up of deposits that could give rise to an imbalance. If necessary clean the fan blades using a stiff brush and vacuum cleaner. 3. Replace panels accordingly. CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 23

24 4.1.5 Oil Filter (if applicable) 1. Release the securing bolt, or unscrew the filter bowl, to access the filter. 2. Clean the filter or replace as deemed necessary. 3. Refit bowl ensuring that seals are correctly in place Replacement of Faulty Components Burner Components 1. Refer to the burner instructions supplied with the heater for information regarding replacement of components within the burner Gas Controls Assembly (if applicable) 1. Remove the electrical connections from the gas control block. 2. Release the nuts securing the inlet and outlet flanges to the gas control block and lift out the gas control block. Fit the replacement assembly in reverse order ensuring the valve is correctly orientated =for the direction of gas flow Main Air Fan and Motor Important: On 3ph heaters fitted with 3ph main fan motors ensure that the fan direction of rotation corresponds with the direction of rotation arrow on the fan guard or case. If necessary reverse the direction of rotation by interchanging any two of the motor live leads at the terminal strip in the electrical panel. Should it be necessary to remove one or more of the fans for cleaning proceed as follows. exchanger mounting frame to the fan shroud on the side that the fan is going to be withdrawn. 4. Withdraw the fan from the slide rails. 5. Reassemble in reverse order CPx - CPx 300 Note: These units are fitted with belt driven main air fans. 1.Remove the lower side panel(s). 2. Release the motor mounting plate securing screws and then remove the belt tension by turning the tension adjustment screw anticlock wise. Remove the fan belts. 3. Remove the screws securing the fan mounting feet to the heater framework and remove the fan. It may be necessary to re-orientate the fan within the fan compartment and also to release the fan shroud fixings in order to pass the fan through the heater frame. On units with twin or triple fan sets on a common fan shaft it will be necessary to first remove the fan shaft. 4. Inspect the fan belts and if necessary replace with new. 5. Replace components in reverse order. 6. Do not over tension the fan belts. There should be approximately 15mm of deflection when downward pressure is applied to the belt(s) halfway between the motor and fan pulleys. Fig 3 Fan belt tension setting CPx 30 - CPx 120 Note: These heaters are fitted with direct drive fan units. 1. Disconnect the fan motor electrical leads from the terminal strip (Refer to wiring diagram supplied with the heater) 2. Remove the two screws, one on each side of the fan mounting flange, that secure the fan to the fan shroud. 3. Remove the screws securing the heat Page 24 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

25 Fan / Limit Thermostat Honeywell L4064B NOTE: Larger heaters have two fan and limit thermostats fitted. Either one will start the main fans and either one will shut down the burner in the event of an overheat situation. 1. Squeeze the sides of the cover and remove cover by pulling forward. 2. Release wiring from clamp terminals by pushing a small screwdriver into the clamp release holes adjacent to the clamps. 3. Remove the 2 screws securing the thermostat to the heater panel and withdraw thermostat. 4. Reassemble new unit in reverse order referring to the heater wiring diagram to ensure correct wiring location. Important: A replacement fan/limit thermostat may have a brass link between the bottom fan terminal and the bottom limit terminal (situated in the slot between the two terminals). This MUST be removed, by breaking the link off using a pair of thin nose pliers, before the replacement thermostat is installed. Fig 4 Thermostat Fan / Limit - Honeywell L4064B Fan Circuit OUT Fan ON Override Mechanical Limiter Release Point Fan Circuit IN CAUTION 50 F A N O F F I T DO NOT ROTATE - HOLD DIAL WHEN SETTING POINTERS 100 I M L O N Set Point Dial O F F Brass Link Location NOTE: Temperature points on the dial are in Fahrenheit Mechanical limiter Limit Set point Adjustment Limit Circuit OUT Fan ON Set point Adjustment Fan OFF Set point Adjustment Limit Circuit IN CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 25

26 4.2 Fault Finding Refer also to the burner supplement supplied with the heater Fault Cause Action Main burner will not light Electrical 1. Check electrical supply is ON. 2. Check controls are ON or calling for heat. 3. Faulty ignition probe/lead/setting. 4. Faulty burner control unit. 5. Limit thermostat open circuit/faulty, interlock relay not set/faulty Gas/Oil 1. Check fuel supply is present. Main burner lights, but goes out before Electrical 1. Unit goes out on high limit - main fan comes on or whilst controls still a. Check fan thermostat setting - See Section calling for heat Page25 b. Faulty fan thermostat - change c. Check limit thermostat setting - See Section Page25 d. Faulty limit thermostat - change. e. Faulty fan assembly - change. f. Fan motor out on thermal overload. - Check running amps. See Table 3.- check duct resistance See Table 2. Page 21 g. Check that airflow through the heater is not restricted. Gas/Oil 1. Check continuity of fuel supply. Main fan runs continuously Electrical 1. Summer/Winter switch set to Summer - set to Winter. 2. White button on fan/limit thermostat pushed in - pull out. 3. Fan thermostat set too low - check setting See Page25 4. Faulty fan thermostat - change Main fan fails to run Electrical 1. Fan motor or capacitor failed - replace. Page 26 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

27 Notes CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014 Page 27

28 Appendix A Calculation Of Flue System Equivalent Resistance The pressure resistance of the flue system (Pr) = 1.5 * [(PFF*H/D+SRF)Qm/Wm2] (pa) Where H = Effective flue height in m D = Internal Diameter of flue in m PRF (Pipe Friction Factor) = 0.118*( /D0.4) Where D = Internal Diameter of flue in m SRF (Sum of individual resistance factors) Typical resistance factors for individual components are as follows Segmented 90 bend Elbow 0.4 Cowl 1.0 Qm (Mean Density of the column of exhaust gas in kg/m3) = 97000/(300*Tm) Where the mean temperature of the column of exhaust gas (Tm) = 288+((Te-TL)/0.2)*(0.18) Where Te is the exhaust gas temperature in C TL is the external air temperature in C Wm (Mean exhaust gas velocity in m/s = M/(A*Qm) Where A is the cross sectional area of the flue in m2 M is the exhaust gas mass flow in kg/s which is as follows for the various units CPx CPx CPx CPx CPx CPx CPx CPx CPx CPx HEATING DIVISION Hort Bridge Ilminster, Somerset TA19 9PS Tel: Fax: Every effort is made to ensure accuracy at time of going to press. However as part of our policy of continued product improvement, we reserve the right to alter specification without prior notice. Page 28 CPx Gas or Oil Cabinet Heater Range Issue 2.2 November 2014

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